U.D Harrold is the founder of Ultradine Cams, I consider him a leader in camshaft
design. He sold the company to J. Partrage, the founder of Bullet racing cams
and former long time employee of Lunati cams.

U.D Harrold is the founder of Ultradine Cams, I consider him a leader in camshaft
design. He sold the company to J. Partrage, the founder of Bullet racing cams
and former long time employee of Lunati cams.

Go over to Team Chevelle and check there, Harold is a member over there and HIGHLY respected. Ultradyne is good stuff especially for BBC's. Although he is no longer affiliated with Ultradyne the last I knew he had good things to say about the new owner and they were still using his grinds.

Go over to Team Chevelle and check there, Harold is a member over there and HIGHLY respected. Ultradyne is good stuff especially for BBC's. Although he is no longer affiliated with Ultradyne the last I knew he had good things to say about the new owner and they were still using his grinds.

found this nice little right up of harold ( ultradyne ) over at team chevelle thanks hippie

Don't apologize....I sometimes think threads for him were meant for me, too...
Since you asked, I'll give everyone a very very short history of me, so you'll know where I came from.
1969---Went to work for State of Mississippi as computer operator, rose to be lead operator at CDPA, Central Data Processing Agency.
1972---Began working on cam design program in my spare time.
Dec 15, 1972---Sold 310AP SBC solid to Reed Cams, Georgia, for $125.00.
1973---Made $3000 selling to Reed, Isky, Engle, Norris.
1974---Designed Reed's RxxxULX line of rollers, and a lot more, including Benny Parson's 1975 Daytona 500-winning cam. Also Shirl Greer's TF/FC NHRA National Champion Nitro Funny car cam, designed for Norris, and it was a True Chrysler flat tappet, with .438" lobe lift.
1974---Became General Kinetics' cam designer, worked with people like Bill Jenkins and Jack Roush on the cams for their ProStockers.
1976---Jenkins wins Pro Stock Natinal Championship, with GK doing large-barrel cams.
1977---I start in January with Competion Cams, as their original cam designer. Over the next 3 years, I design them hundreds of cams, including the 268 High Energy. I introduce them to the unsymmetrical cam.
1979---I write them their 1st in-house cam design program. Before that, we shared a program with Cam Dynamics.
1980---After negotiating since late 1976 for some stock ownership in Competition Cams, I leave and start UltraDyne on April 1st, 1980. The 1st month I design the 288/296F5 and the 288/296R6, the 2 most popular cams I ever made.
1981---In September, I hire my 1st employee, Mike O'Neal, who ran my shop, made all my models and masters, etc.
1982---We're running 2 shifts, from 7:00 AM to 12:00 PM. Tim Goolsby comes to work for me, he is Mike's brother-in-law. I also design UltraDyne's first hydraulic cams, such as the 272, the 276, the 288/296H.
From then on until 2000, we all just worked. UltraDyne grossed over $1.2 Million a year from 1990 to 1999.
2000---A number of independent factors began to take their toll---Federal Mogul acquiring my 2 major solid lifter core manufacturers, and their later Chapter 11, Lifter companies disappearring, tremendous cash-flow problems in the end of 2000, initially triggered by the UPS strike---We lost around $50,000 in the strike.
2001---A un-named cam company in Memphis hires 8 of my 12 employees, and 2 more just leave because they think --that's it. Only Tim and Gail are left with me.
2001-2003---UltraDyne is in the Chapter 11 'Death Spiral'. I take a $0 salary for 2002, and pump all my, and my wife's, retirment money into UltraDyne, along with all the equity I could get on my house, etc, etc, etc.
June 2003---Everything is gone, the government locks the doors.
August 2003---I go to work at Lunati, charged with completely re-doing their entire line of cams. Mike is already there, waiting for me, along with Steve Slavik, who worked for me for 13 years (Mike for 19...). Then I meet the corporate world.....
Oct 2004---Lunati introduces the VooDoo cams. And they really work good.....

This has been the line and times of a cam designer, and even with the down sides, it has been the time of my life, and I'm going to stay at it as long as I can.....

No comments are necessary, you are all a great bunch, and as that Great American, Minnie Pearl, said, "I'm just so proud to be here!"

We have used Ultradyne cams for years and have made great power with there cams alot of our cam are custome grinds as we build a lot circle track engines and we use a lot of the BBC cam cores in our SBC and the cams we spec out reall have seem to work out fine.

Last I new Harold was working for Buddy and Joey Arrington doing cam research for there engine shop where tey build some to Dodge engines.

From UDHarold himself!
“I work for Custom Camshaft Company, a division of Arrington Manufacturing. I stay at my house in Senatobia, MS, and telecommute to work in Martinsville Va. My office phone is 662-301-1245, and so far I'm having to take my wife to work, she's a Staff Accountant in Memphis, so I'm not here before 9:00 AM CST or from 4:00 PM to 6:00 PM CST. I answer the phone when it rings, and have sold several cams to Team Chevelle members.”

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.

User Name:

Password

Please enter a password for your user account. Note that passwords are case-sensitive.

Password:

Confirm Password:

Email Address

Please enter a valid email address for yourself.

Email Address:

Insurance

Please select your insurance company (Optional)

Log-in

User Name

Remember Me?

Password

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.